An instrument that gives a reading of height in feet. The setting is based off of a pressure setting, in hectopascals (hPa) and the height shown can vary depending on what reading is required. Common readings will be set for Above Mean Sea Level (AMSL), Above Ground Level (AGL), or can be set for a Flight Level with the standard QNH setting of 1013 hPa.
An instrument that gives a reading of height in feet. The setting is based off of a pressure setting, in hectopascals (hPa) and the height shown can vary depending on what reading is required. Common readings will be set for Above Mean Sea Level (AMSL), Above Ground Level (AGL), or can be set for a Flight Level with the standard QNH setting of 1013 hPa.
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